package com.cy.pc;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class C {
    public static void main(String[] args) {
        Data3 data = new Data3();
        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                data.printA();
            }
        }, "A").start();
        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                data.printB();
            }
        }, "B").start();
        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                data.printC();
            }
        }, "C").start();
    }

    static class Data3 { //资源类 Lock
        private Lock lock = new ReentrantLock();
        private Condition condition1 = lock.newCondition();
        private Condition condition2 = lock.newCondition();
        private Condition condition3 = lock.newCondition();
        private int number = 1; // 1A 2B 3C

        public void printA() {
            lock.lock();
            try {
                //业务，判断-> 执行-> 通知
                while (number != 1) {
                    //等待
                    condition1.await();
                }
                System.out.println(Thread.currentThread().getName() + "=>AAAAAAA"); // 唤醒，唤醒指定的人，B
                number = 2;
                condition2.signal();
            } catch (
                    Exception e) {
                e.printStackTrace();
            } finally {
                lock.unlock();
            }
        }

        public void printB() {
            lock.lock();
            try {
                //业务，判断-> 执行-> 通知
                while (number != 2) {
                    condition2.await();
                }
                System.out.println(Thread.currentThread().getName() + "=>BBBBBBBBB"); // 唤醒，唤醒指定的人，c
                number = 3;
                condition3.signal();
            } catch (
                    Exception e) {
                e.printStackTrace();
            } finally {
                lock.unlock();
            }
        }

        public void printC() {
            lock.lock();
            try {
                //业务，判断-> 执行-> 通知 // 业务，判断-> 执行-> 通知
                while (number != 3) {
                    condition3.await();
                }
                System.out.println(Thread.currentThread().getName() + "=>CCCCCCC"); // 唤醒，唤醒指定的人，c
                number = 1;
                condition1.signal();
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                lock.unlock();
            }
        }

    }
}
